CAPE Biology Unit 1 · 2014 · Paper 1 · Question Q45

Items 44–45 refer to the following diagram of a small section of the human placenta as seen in an electron micrograph. Which of the following correctly identifies the structures, X and Y? \begin{tabular}{|l|l|l|} \hline & \multicolumn{1}{c|}{\textbf{X}} & \multicolumn{1}{c|}{\textbf{Y}} \\ \hline (A) & Microvilli & Chorion \\ \hline (B) & Microvilli & Amnion \\ \hline (C) & Protective barrier & Chorion \\ \hline (D) & Protective barrier & Amnion \\ \hline \end{tabular}

1. (A)X: Microvilli; Y: Chorion
2. (B)X: Microvilli; Y: Amnion
3. (C)X: Protective barrier; Y: Chorion
4. (D)X: Protective barrier; Y: Amnion

This question uses a figure or table from the paper — you'll see it when you practise.